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Van Niekerk breaks 400m world record |Centurion Rekord
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Wayne van Niekerk Win 400M And Set World Record Rio 2016 - YouTube
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South Africa's Wayde van Niekerk breaks 400m world record - YouTube
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Muhammad sets world record in 400m hurdles
Niekerk breaks 400m world record - DTNext.in
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Women's 400m World Record is 48.25 – Žiga P. Škraba
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Muhammad breaks world record in 400m hurdles at nationals
American Muhammad breaks own world record to win 400m hurdles
Niekerk shatters world record in 400m to win gold
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Wayde van Niekerk breaks world record to win 400m gold in Rio ...
